Welding electrode



Patented Oct. 23, I923.

umrao STATES sums r. cormm), or HUDSON, QEIO.

WELDING ELECTRODE Io Drawing.

To all whom it may concern:

Be it known that I, JAMES P. COPLAND, a citizen of the United States, and a resident of Hudson, county of Summit, State of Ohio, have invented certain new and useful Im rovements in \Velding Electrodes, of which the following is a specification.

My invention relates to electrodes for electric welding processes, the chief object being to provide an electrode of new and improved composition and properties; In practising my invention in an arc welding process I utilize as a terminal in an electric welding circuit an electrode com- 16 posed of tungsten in predominating amounts and containing smaller amounts of. chromium preferably not in excess of 30 parts by weight. Electrodes composed of tun ten and containing chromium have a low il- 20 ing point as compared with carbon thereby providing an are considerably cooler than the carbon arc; are more resistant to the destructive and oxidizing action of an electric arc than carbon and similar electrodes 26 in use at the present time and are sufiiciently strong and ductile to withstand the usage to which the ordinary electrode is subjected in handling and, in actual use.

Electrodes of m improved composition 30 are especially suita 1e for use in arc welding processes wherein the electrode does not enter the weld or seam metal for increasing the amount thereof.

Although in its preferred form the com- Applieatlon filed November 12, 1921.

Serial No. 514,760.

position of. my improved electrode consists of tungsten and chromium, I do not wish to be limited to these metals since as an equivalent of tungsten I may use one'or more of the following metals: titanium, iridium, palladium, osmium, and various other met- 40 als of similar characteristics, especially as regards boiling point.

Although for purposes of illustration I have hereinabove described my invention as embodied in an electrode for use in the are .welding process, it is to be understood that it is equally applicable to resistance welding prooesses, particularly spot welding. he scope of my invention is defined by what is claimed. 7

What is claimed is:

1. An electrode for electric weldin consisting of a metal havin a. relative y low boiling point as compare with carbon and containing an appreciable amount of chro- 65 mium.

. 2. An electrode for electric welding containing chromium and tungsten.

3. An electrode for electric welding containing tungsten in a predominating amount 60 and a substantial percentage of chromium.

4. An electrode for electric arc welding containing tungsten and about 30 per cent by weight'of chromium.

In testimony whereof I hereunto aflix my 66 signature.

JAMES P. COPLAND. 

